Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May brings a temperature increase in Altoona, with average high-temperatures moving from April's mild 59.5°F (15.3°C) to a pleasant 69.6°F (20.9°C). In Altoona, the May nights cool down to an average low of 52.9°F (11.6°C).Humidity
The average relative humidity in May is 78%.Rainfall
May is the month with the most rainfall. Rain falls for 11.6 days and accumulates 0.98" (25mm) of precipitation.Snowfall
In Altoona, Iowa, snow does not fall in May through September.Daylight
In May, the average length of the day in Altoona is 14h and 33min.On the first day of the month, sunrise is at 6:09 am and sunset at 8:12 pm. On the last day of May, in Altoona, sunrise is at 5:41 am and sunset at 8:41 pm CDT.
Sunshine
In Altoona, the average sunshine in May is 8.7h.UV index
The average daily maximum UV index in May in Altoona is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: A maximum high daily UV index of 5 during May translates into the following directions:
Undertake precautions - It is suggested to shield oneself from sunburn. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the average May temperature in Altoona?
What is the average humidity in May in Altoona?
What is the rainiest month in Altoona?
How many days does it rain in May in Altoona?
When it does not snow in Altoona?
Does it snow in Altoona in May?
What is the average length of the day in May in Altoona?
When is the sunrise / sunset in May in Altoona?
How long on average sun shines in May in Altoona?
What is the UV index reading in May in Altoona?
Average temperature in May
Altoona, IA
- Average high temperature in May: 69.6°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in May: 52.9°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in May
Altoona, IA
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Altoona, IA
- Average wind speed in May: 8.8mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in May
Altoona, IA
- Average humidity in May: 78%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in May
Altoona, IA
- Average rainfall in May: 0.98"
The wettest month (with the highest rainfall) is May (0.98").
The driest months (with the least rainfall) are January, February and December (0.24").
Average rainfall days in May
Altoona, IA
- Average rainfall days in May: 11.6 days
The month with the highest number of rainy days is May (11.6 days).
The month with the least rainy days is January (1.8 days).
Average snowfall in May
Altoona, IA
- Average snowfall in May: 0"
The month with the highest snowfall is January (0.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Altoona, IA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Altoona, IA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in May
Altoona, IA
- Average sunshine days in May: 16.6 days
The month with the most sunshine days is December (25.5 days).
The month with the least sunshine days is June (15.5 days).
Average UV index in May
Altoona, IA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Altoona, IA
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and September (Cloud cover 29).
Average visibility in May
Altoona, IA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Altoona, Iowa, USA
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